共查询到18条相似文献,搜索用时 109 毫秒
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选用大孔阴离子树脂对硫酸锰溶液中的氯离子进行了静态和动态的吸附实验研究,结果表明,在pH=6.5~7.0,氯离子含量为1.53 g/L的条件下,树脂对Cl-有良好的吸附性能,氯的交换容量为20.3 mg/g湿树脂,吸附的氯离子可用0.5 mol/L的稀硫酸解吸,解吸率可达97.4%。 相似文献
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在湿法烟气脱硫系统运行时,因吸收剂循环使用,吸收塔内浆液中的氯离子会随着脱硫系统的运行逐渐富集,对脱硫系统和周边环境产生很大的危害,所以对脱硫废水的脱氯处理进行了研究。采用丙烯酸强碱性阴离子交换树脂,对比了静态及动态吸附条件下树脂对氯离子的吸附容量,研究了动态吸附条件下钙、镁离子质量浓度的变化以及树脂的再生性能,重点研究了在静态吸附条件下螯合剂和软水剂的添加对吸附过程中溶液pH以及氯、钙、镁离子质量浓度的影响,考察了静态吸附条件下树脂的再生性能。结果表明:在动态吸附条件下,由于絮状沉淀的影响,树脂的再生性能大大降低;在静态吸附条件下,树脂对氯离子的吸附容量比动态吸附条件少约30%,螯合剂和软水剂的添加有助于提高树脂的吸附容量,有助于降低废水pH(添加软水剂条件)和氯离子含量,有助于减少游离钙、镁离子产生的絮状沉淀对树脂吸附性能的影响并提高树脂的再生性能。 相似文献
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新型交联壳聚糖树脂颗粒对铂的吸附行为 总被引:4,自引:0,他引:4
以甲醛为预交联剂、环硫氯丙烷为交联剂,合成了新型交联壳聚糖树脂,用扫描电镜、X射线衍射仪及红外光谱表征了树脂的结构,考察了交联剂用量对铂吸附量的影响,研究了树脂对铂的吸附动力学、等温吸附特性及解吸特性. 结果表明,壳聚糖与交联剂的最佳用量比为壳聚糖:甲醛:环硫氯丙烷=1 g:7 mL:2 mL;树脂吸附铂的动力学符合Boyd液膜扩散方程,其吸附控制过程以液膜扩散为主,表观吸附活化能为14.28 kJ/mol,其等温吸附过程符合Freundlich等温吸附方程;以硫脲(1%)-盐酸(1 mol/L)作为铂的解吸剂,解吸时间为1 h,解吸率达到99.75%. 相似文献
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《化学工程师》2018,(11)
本文研究了H-103大孔树脂吸附废水中Cl-的热力学特性。研究结果表明:H-103树脂吸附废水中Cl-符合Freundlich等温吸附方程,方程拟合不同温度下Kf值的变化不大,说明温度对吸附量影响很小,拟合得到的Freundlich方程参数n值均大于1,表明H-103树脂吸附氯离子属于优惠吸附;吸附焓变ΔH0,表明氯离子在H-103树脂上的吸附为放热过程;但ΔH5kJ·mol-1,焓变值很小,表明温度对吸附影响不明显,同时也表明吸附过程不存在配位基交换或化学键力等强吸附力的作用。ΔG0,表明氯离子在大孔树脂上的吸附过程能够自发地进行。不同氯离子初始浓度下ΔG变化在-3~-5kJ·mol-1范围内,说明该吸附过程为物理吸附。吸附熵变ΔS0,表明在Cl-的吸附过程中同时存在着溶剂的解吸,ΔS变化范围为0.004~0.1kJ·mol-1。 相似文献
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吸附法分离紫草细胞培养液中紫草素的研究 总被引:1,自引:0,他引:1
采用吸附法提取分离紫草细胞培养液中的紫草素。研究了几种吸附剂对紫草素的吸附与解吸。结果发现:大孔树脂HD-1效果较好,每毫升湿树脂的吸附量可达8.69mg/mL,解吸率达96%以上。与传统的萃取法相比,有机溶剂用量减少60倍左右,节省动力消耗,简化操作,大大降低分离成本,有利于工业化。 相似文献
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The adsorbent resin was prepared by grafting copolymerization of acrylic acid and acrylamide onto cellulose under microwave irradiation, and was applied to adsorb copper ions from wastewater. The influences of adsorption time, resin particle size, pH values, and temperature of solution on its adsorption performance were investigated. At the optimal adsorption conditions, adsorption ratio could get to 99.2% and the adsorption capability reached 49.6 mg/g. Furthermore, adsorption theory model was based and study showed that the physical adsorption was dominating and it accorded to Freundlich isotherm model. XPS of adsorbent resin complex was tested, which ensured the chelating groups onto adsorbent surface. Adsorbent resin could be regenerated using 8% NH3·H2O, which had good regeneration effect, and experiment showed that adsorption ratio could still keep over 90% when resin was regenerated seven times. So, heavy metal‐ions could be reclaimed from gel resin and the circulation of resources could be realized. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci, 2006 相似文献
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合成了壳聚糖包覆纤维素(CHCC)吸附剂,其结构经FTIR、元素分析进行表征。研究了对Au3+的吸附包括pH的影响、吸附动力学、吸附选择性和吸附热力学。结果表明:吸附容量受pH影响较大;液膜扩散是吸附的主控制步骤,pH=3时优先选择吸附Au3+;吸附热力学符合Freundlich模型。-NH2、-OH参与对Au3+的吸附,树脂中的-CHO可能被Au3+氧化。 相似文献
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通过静态吸附试验,研究一种由超分子受体化合物磺化硫杂杯芳烃(TCAS)与树脂结合的产物-新型TCAS树脂对水体中三氯甲烷的吸附去除性能.结果表明,对于25 mL质量浓度为1mg·L~(-1)的三氯甲烷污染水,投加0.5g TCAS树脂吸附40min后,去除率可达99%以上.TCAS树脂对三氯甲烷吸附的操作温度应控制在5~15℃左右为最佳.pH是影响TCAS树脂吸附效果的重要因素,在pH=6~8时去除效果较好.Ca~(2+)和Mg~(2+)背景阳离子的存在会加快TCAS树脂对三氯甲烷的吸附速率.在试验范围内,TCAS树脂对三氯甲烷吸附符合Freundlich方程.伪二级反应动力学方程能够较好地描述TCAS树脂对三氯甲烷的吸附过程. 相似文献
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以纯咖啡因的水溶液进行了静态吸附与解析实验,并以新华制药厂提供的咖啡因甲基化母液为原料进行了动态实验,考察了极性大孔树脂XDA-8对咖啡因的吸附性能,探讨了其实际应用的可行性。静态实验结果表明,在pH 6~7的水溶液中,树脂对咖啡因的吸附量达到最大,293 K下,树脂的最大理论吸附量可达432.9 mg/g干树脂;温度升高,树脂对咖啡因的吸附能力下降;动力学分析表明,树脂对咖啡因的吸附过程为液膜扩散控制。动态实验结果显示,XDA-8树脂能完全吸附4 BV(BV-树脂体积)甲基化母液中的咖啡因,对6 BV甲基化母液中咖啡因的吸附率达到97.5%以上,负载柱可用60%乙醇完全洗脱。 相似文献
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Lin‐Cheng Zhou Yan‐Feng Li Shu‐Jiang Zhang Xi‐Jun Chang Ying‐Feng Hou Hai‐Xia Yang 《应用聚合物科学杂志》2006,99(4):1620-1626
A series of new chelate resins were synthesized by ring‐opening polycondensation of the reaction mixture of furfural with diethanolamine, using sulfuric acid as a catalyst, and the resulting chelate resins were employed in the adsorption for metal ions Bi, In, Sn, V, Ga, Y, Ti, and Pb. The composition, structure, and properties of the resulting chelate resin were studied by means of fourier transform infrared (FTIR), electron paramagnetic resonance spectrum (EPR), and elemental analysis methods. Meanwhile, the adsorption properties of the resulting chelate resins for the above metal ions were investigated by inductively‐coupled plasma–atomic emission spectrometry (ICP‐AES) procedures. The results show that the resulting chelate resins hold the structure consisting of hydroxyl groups, amine groups, and conjugated π bonds, as well as more crosslinkages, and so they exhibit a good reactivity and chemical stability. The adsorption experiments show that the chelate resins could well adsorb V, Ga, Y, Ti, and Pb in a wider acidity range and exhibit a good adsorption selectivity. Particularly, the chelate resins could adsorb and desorb for Pb, Bi, In, V, Y, and Ti, quantitatively, in the given conditions. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1620–1626, 2006 相似文献
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Haitao ZHANG Xiaoqing MA Xian QU Jeanpierre Arcangeli 《Frontiers of Chemical Science and Engineering》2011,5(1):113
A physicochemical method was used to adsorb glycerin in saline wastewater by strong base anion resin (D201). Boric acid, a kind of weak acid, can combine with glycerin, and a specific complex can be produced, which possess bigger molecule than glycerin. Then, this specific complex could be adsorbed by strong base anion resin. Via the experiment, the equation of adsorption isotherm with D201 at 20°C can be shown by lgx /m = 1.74lgC e - 5.72; for column test with simulative glycerin wastewater, the treatment capability was more than nine bed volumes, and 39.77 mg glycerin could be removed by per gram resin. When the NaCl concentration was 10 g/L, five bed volumes of simulative wastewater could be treated, and the adsorb mass was 29.09 mg/g. When the NaCl concentration was 30 g/L, only three bed volumes of simulative wastewater could be treated, and the adsorb mass was 14.83 mg/g. 相似文献